http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Fifteenth Technical Conference on Petroleum Production [held October 24-26, 1951]
Technical Conference on Petroleum Production 1951 : Pennsylvania State College)
Pennsylvania Grade Crude Oil Association
138 pages, 163 unnumbered pages : illustrations ; 28 cm.
[sponsored by The Pennsylvania State College] in co-operation with The Pennsylvania Grade Crude Oil Association.
Bulletin (Pennsylvania State College. Mineral Industries Experiment Station) ; no. 59